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Which Schaeffer oil is best to use in Harley Davidson Transmission

I want to start using Schaeffer oil for my Harkey. I am wondewring which oil is better to use in the transmission. I read all over the Harley forums that you can use either a gear oil or a staright weight SAE 50. What do you recommend I use in the transmission? I have no problem using the #707 20W-50 in the engine and primary, but what do you recommend for the transmission? Any other information related to this would be greatly appreciated and thank you too for your time.

--Bob Davis

Answer:

There are three choices for the transmission oil depending on your model as follows: